Reversing-valve mechanism for internal-combustion motors.



No. 880,051. f I PATENTED FEB. 25', 190% J.SULZER. REVBRSING VALVEMECHANISM FOR INTERNAL'GOMBUSTIQN MOTORS. v APPLICATION FILED D39. 8,1905. i I

WITNESSES! To all whom it may concern:

rnvirnn as mass JAKOB SULZER, OF WINTERTHUR, SWITZERLAND.

Specification ofLetters Patent.

Patented Feb. 25, 1908.

Application filed December 8. 1906. Serial No. 290,915.

Be it known that I, JAKOB SULZER, engineer, a citizen of the SwissRepublic, residing at lVinterthur, 97 Langgasse, Switzerland, haveinvented certain new and useful Irn rovements in Reversing-ValveMechanism for Internal-Combustion Motors; and I do hereby declare thefollowing to be aiull,

clear, and exact description of the invention,

" of the valve mechanism whereby the eccensuch as will enable othersskilled in the art to which it appertains to make and use the same. 7 I

This invention relates to an improved reversing valve mechanism for thatkind of internal combustion motors wherein after outting ofi the supplyof combustible in the working cylinder gaseous pressure fluid is in.-troduced so as to eiiect the reversal or the starting of the motor.

.The invention consists in an arrangement trics or cams that operate thereversing valve and the combustible supply valve are shifted 'theworking cylinder.

simultaneously by an actuating device in suchmanner that while the oneeccentric or cam and its corresponding valve are put out of action theother cam is made to actuate its corresponding valve.

An arrangement for'carrying out the invention is shown on theaccompanying drawing which is a longitudinal section through In thecylinder head of the working cylinder a are provided two valves 7), c ofwhich the valve 7) serves for admitting; the combustible mixture intothe cylinder, while valve 0 serves for introducing a supplyof gaseousfluid under pressure. For

actuating valve 5 there is mounted on the cylinder head a two-armedlever d and for actuating valve 0 .there is provided a two-armed lever0. These levers, which work on a hori- Zontal shaft are connected to therods of the valves andcarry at their other ends rollers f and grespectively. For actuating the lever (Z there is provided a cam plateIt beneath the roller f thereof and in the same plane therewith and foractuating lever 6 there is provided a cam plate i under the roller 9 andin the same plane therewith. These cam plates are-mounted on theperiphery of an eccen- -:atr1c Z fixed on a valve motion shaft k and thehave each two operating bosses h h an( t 7 as also an inoperative part7L3 and i s tuated between the bosses. To the cam plate h is pivoted alink m which is connected to the one arm of a two-armed lever n whoseother arm is connected by a link 0 to the pin of a crank disk p, whileto the cam plate 1' is pivoted a link (1 which is connected to the onearm of an elbow leverm mounted loose. on the axis of lever n and havingits other arm also connected by a link .9 to the pin of the crank disk11. 011 the shaft of this crank disk is fixed a worm wheel t with whichgears a worm 11 whose shafthas a hand wheel c. The action of thisreversing mechanism is as follows:

The drawing shows the motor arranged for the one direction of motion forinstance for the forward motion. The valve motion shaft imparts by meansof its eccentric l a to and fro motion to the cam plates h and 'i'; bymeans of the boss h bearing the roller f, the combustible supply valveis opened by the lever (1, while the supply valve 0 remains closed,because the roller 9 of its actuating lever c is situated over theinoperated part i of the cam plate i, this part'being so formed as notto move the lever during its rocking motion.

For reversing the motion of the motor the worm' u is rotated by means ofthe hand wheel '22 so as to turn the worm wheel t and crank disk 7) inthe direction of the arrow so that the crank pin is made to move fromthe position I into the position 11. By this means the cam plates are soshifted upon'the periphery of the eccentric Z that the roller 9 of lever'6 comes in contact, with the boss i while roller f of lever d isbrought over the inoperative art h so that on the rotation of the shafting rocking motion of the cam lates the pressure fluid supply valve cw'l now be oplened during the upstroke of the piston, w ile the valve 6on the other hand will remain closed, as the lever d is not actuated andeccentric Z and the resultby the part b of its cam plate. The valve cbeing opened, pressure fluid enters the cylinder so as to reverse themotion of the motor or to start it in the reverse direction The crankdisk 7) is now turned farther in the same direction until. the crank pinattains the position III; by this means the boss It of thecam late It isbrought to bear against the roller ff while the inoperative part i isbrought under the roller g so that on the continued. rocking motion ofthe can; lates, the combustible supply valve I) wil now be opened andthe valve 0 will remain closed.

For-again reversing the motion of the motor, the crank diskis againturned 'in-the same direction until the crank pin is in the position IV.The camplates are thereby so shifted u on'the eccentric Z that the cam71 bears with its boss '2', against the roller 9 while the inoperativepart 7:? of h comes under roller now entering the cylinder, the pistonis in the first instance-brought to a standstilhfiand then has itsmotion reversed". The crank assumes the position I (as on the drawing)disk is then again turned iintil the crank pin when thecombustiblesupply valve 1) will be opened and valve 0 will remainclosed.

invention and; the best w a 'Iknow of carrying'the same into practicaeffect, I claim 1'; An internal combustion or explos'ion motor havingareversing valve and a fuelsupply valve, in combination with oscillat-'ing cam-plates for actuatin said valves, and

means for shifting the oscil atin cam-plates to an intermediate positionin w ich they do not move the said valves, and into two ex? to the twotreme positions, correspond' directions of movement of t e rn'otor,v 1n

the upstroke of" which'they do move the said valves, sub

stantially as described.

, 2. An internal combustion or explosion motor having a reversing "valveand a fuel-- j respondin to the two direotlons of movement of t e motor,in which they do move the. said valves, and means for simultaneouslyshifting the said camlates from a Lposition inwhich the fuel-amission-valve is operated by this cam-plate and the reversing valve isnot operated, toa positionin which the reversing valve is actuated bythisv Having thus described the nature of this.

cam-plateand the fuel-admission-valve is not operated, and then into aposition which the fuel-admission valve is operated at ;a'timecorresponding to thereversed move- -.ment' of the engine and thereversingvalve is not operated, substantially. as descr1bed..

Intestimony whereof I have affixed my signature, in presence of twowitnesses.

JAKOB SULZER... Witnesses: 7

AUGUST ,MARKLIN, EMIL FREIMANN.

